KANGDA 2QT13 BH2QT85R9 Fuel Injection Pump – Direct Fit For 2110 Engine

Designed for the Yangchai 2110 diesel engine running at 2400 RPM (direct drive), the KANGDA 2QT13 (BH2QT85R9) is a precision-engineered mechanical fuel injection pump that delivers reliable fuel metering and high-pressure delivery for agricultural and industrial power units. As a direct replacement component from Shandong Kangda Precision Machinery, this pump ensures consistent start-up performance, stable idle control, and optimal fuel atomization under continuous-load conditions. For workshops servicing Yangchai (Yangzhou Diesel Engine) applications, this assembly restores OEM fuel timing and injection pressure without requiring electronic calibration, making it a practical solution for mechanical diesel systems where durability and serviceability remain top priorities.

The 2QT13 order number corresponds to the BH2QT85R9 pump model, a 2-cylinder in-line mechanical injection pump engineered specifically for 4-stroke diesel cycle applications. It features a plunger diameter of 8.5mm with a 9mm cam lift stroke, delivering injection pressures exceeding 1200 bar at rated speed. The pump operates with a clockwise rotation (viewed from drive end) and uses a flange-mounting interface with M10×1.25 stud bolts. Key calibration parameters include: static injection timing of 23° BTDC, governor start speed of 625 ± 25 RPM, and max torque fuel delivery of 65 mm³/stroke. The pump body incorporates an integral mechanical governor with torque cam correction for improved low-speed response, while the delivery valve holder uses a M18×1.5 thread for standard high-pressure line connections. Dry weight is approximately 6.2 kg.

This pump is factory-specified for the Yangchai 2110 series diesel engine, a naturally aspirated, water-cooled, 2-cylinder inline engine with a bore/stroke of 110mm × 115mm, displacement of 2.185L, and rated power of 22kW (30hp) at 2400 RPM. The direct-drive configuration means the pump is gear-driven from the engine camshaft without an intermediate coupling, simplifying installation and eliminating backlash-related timing drift. Beyond the core Yangchai 2110 application, this pump also fits Yuchai 2105, Changchai 2L50, and FAWDE 4DW series derivatives with matching mounting flanges and drive gears. It is widely deployed in agricultural tractors (20-40hp range), small generator sets (15-25kVA), fishing vessel auxiliaries, and industrial water pumps – applications where parts availability and field repairability are more critical than electronic control sophistication.

Proper installation requires adherence to engine timing marks and torque specs. Rotate engine to TDC on cylinder No. 1 compression stroke, verifying via flywheel pointer. The pump drive gear's reference mark must align with the idler gear timing dot – one-tooth misalignment shifts timing by 6° crank angle, causing harsh combustion or power loss. Use a dial indicator through the delivery valve holder to confirm plunger rise; factory spec: 1.85mm ± 0.05mm lift before TDC for 2400 RPM. Mounting bolt torque: M10 flange bolts to 45 Nm with threadlocker. High-pressure line nuts torque to 35 Nm – over-tightening deforms the sealing cone, inducing fuel weepage. After installation, bleed at the inlet banjo bolt and delivery valve holder until bubble-free, then run no-load idle for 5 minutes to purge trapped air.

While modern engines adopt electronic common rail systems, the BH2QT85R9 remains the proven mechanical inline pump for older fleets and off-road equipment with limited diagnostic tooling. Repair cost advantages over common rail: no ECU reprogramming, no IQA coding, no high-pressure sensor diagnostics – fault resolution is purely mechanical. Common failure modes: plunger barrel wear causing retarded timing, delivery valve seat erosion inducing fuel knock, and governor spring fatigue resulting in erratic idle hunting. Each addressed via bench calibration on a standard test stand, with plunger sets under $40 versus $200+ for common rail overhaul. The 2QT13 delivers 8,000–10,000 operating hours before major service, reducing downtime. Its mechanical governor provides inherent overspeed protection – critical for generator applications during load shedding.

Q1: How to confirm BH2QT85R9 matches my Yangchai 2110 if the nameplate is damaged?
A: Cross-check order number (2QT13) and pump model (BH2QT85R9) against engine serial prefix. Engines built after 2008 typically use this pump; earlier use BH2Q80R8. Measure mounting flange (65mm × 85mm) and spline count (17-tooth) for positive ID.

Q2: Can this pump work on a turbocharged 2110?
A: No. The BH2QT85R9 has a fixed torque curve for naturally aspirated operation. Turbo applications require an aneroid or boost-compensated pump – improper fitment causes over-fueling at low boost and high exhaust temps.

Q3: Recommended fuel filtration for maximum service life?
A: Install primary (30μm) and secondary (5μm) filters with a water separator. The plunger/barrel has hard-chrome finish and is sensitive to particles above 10μm. Replace filters every 250 operating hours.

Q4: Compatible with biodiesel blends like B20?
A: Yes, but higher viscosity can delay governor response on cold starts. Use max 50/50 blend and monitor fuel return temperature – if exceeding 65°C, revert to standard diesel to protect seals.

Q5: Typical lead time for pump replacement through distributors?
A: Stocked distributors (Southeast Asia, Middle East, West Africa): 3–5 working days air freight. Factory orders: 15–20 days for production and shipping. Keep one spare per three engines for critical generator setups.